Math help

Week 4 Homework:

1. Solve the formula for R: A = p + PRT

2. Solve the equations:

a) 17y - 2(3 + 10y) = 8(3y - 1)

b) 3(2x + 5) – 7 = 2(3x – 4)

c) 5 – (x + 2) = (x + 4) – (2x + 1)

3. Solve the Equation: 0.6(2x -6) - 5x = -0.4(3x - 4)

4. A bank offers a simple interest rate of 8% a year for a special savings account. If you deposit $700 in the account today and then make no new deposits or withdrawals, how much will you have in the account in 5 years?

5. A gallon of paint covers 160 square feet. How much paint is needed to cover four walls that are 10 by 8 feet each?

7. Use the graph to answer the questions below:

a) Find the percent increase in number of endangered species from 1985 to 1998. b) Find the percent increase in number of endangered species from 1980 to 1998. c) Find the percent increase in number of endangered species from 2002 to 2005. d) If there is a 12% increase in number of endangered animal species from 2005 to

2008, what will the number of endangered animal species be in 2008?

8. Solve the equation:  7 2 5

3 7 3

y y

  

9. Write the percent as a fraction in lowest terms and as a decimal: 24%

10. State whether each of the following inequalities is TRUE or FALSE, and explain your

reasoning for each.

a) 5*3 < 5 + 3 b) 4*7 > 2(4 + 3) c) | 3 - 8 | < | 8 - 3 | d) | -4 - 4 | > | -2 - 2 | e) -92 < (-9)2